Attachment 154094 Details for Bug 198462 – The test source.

The test source.

test.cc (text/plain), 1.00 KB, created by Ivan Kosarev on 2015-03-09 17:57:22 UTC

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Creator: Ivan Kosarev

Created: 2015-03-09 17:57:22 UTC

Size: 1.00 KB

patch

obsolete

>
>#include <pthread.h>
>#include <stdio.h>
>#include <stdlib.h>
>#include <signal.h>
>#include <sys/types.h>
>#include <sys/time.h>
>#include <unistd.h>
>#include <errno.h>
>#include <assert.h>
>#include <string.h>
>
>volatile int Z = 0;
>volatile int Z2 = 0;
>
>volatile int C = 0;
>volatile int C2 = 0;
>
>static void handler(int sig) {
>  (void)sig;
>
>  char buff[] = { (char)('0' + C++ % 10), '\n' };
>  write(2, buff, 2);
>
>  for(int i = 1; i < 10000000; i++)  {
>    Z2 *= i;
>  }
>}
>
>void loop() {
>  for(int i = 1; i < 10000000; i++)  {
>    Z *= i;
>  }
>
>  char buff[] = { '*', (char)('0' + C2++ % 10), '\n' };
>  write(2, buff, 3);
>}
>
>int main() {
>  struct sigaction act = {};
>  act.sa_handler = &handler;
>  sigemptyset(&act.sa_mask);
>  if (sigaction(SIGPROF, &act, 0)) {
>    assert(0);
>  }
>
>  itimerval t;
>  t.it_value.tv_sec = 0;
>  t.it_value.tv_usec = 100;
>  t.it_interval = t.it_value;
>  if (setitimer(ITIMER_PROF, &t, 0)) {
>    assert(0);
>  }
>
>  for(int i = 0; i < 2000000; i++)  {
>    loop();
>  }
>
>  fprintf(stderr, "DONE\n");
>
>  return 0;
>}

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